30 



[Senate 



188 Lucina ?aninilata, 



139 Lucina ? muricata, 



140 Lucina excavata, 



141 Lucina , 



142 Lucina pectinata, 



143 Lucina cancellaris, 



144 Lucina mazatlanica, 



145 Lucina prolongata, 



146 ? Lucina ==, 



147 Lucina ? eburnea, 



148 Lucina ; 



149 ? Fimbria . 



FAMILY DIPLODONTID^. 



150 Diplodonta semiaspera, 

 IbOb Diplodonta semiaspera var. 



[discrepans, 



151 Diplodonta obliqua, 



152 ? Diplodonta serricata. 



FAMILY KELLIAD^. 



153 Kellia suborbicularis ; 



154 Lasea ? rubra, 



155 Lasea trigonalis, 



156 ? Lasea oblonga ; 



157 Lepton clementinum, 



158 Lepton dionaeum, 



159 Lepton umbonatum ; 



160 Pythina sublaevis ; 



161 Montacuta elliptica, 



162 ? Montacuta subquadrata, 



163 Montacuta . 



FAMILY CYCLADID^. 



164 Cyrena olivacea, 



165 Cyrena mexicana. 



FAMILY UNIONID^. 

 '166 Anodonta ciconia. 



FAMILY MYTILID^. 



167 Mytilus palliopunctatus, 



168 Mytilus multiformis ; 



169 Septifer cumingii ; 



170 Modiola capax, 



171 Modiola brasiliensis, 

 171J Modiola brasiliensis var. 



[mutabilis ; 



172 Crenella coarctata ; 



173 Lithophagus attenuatus, 



174 Lithophagus calyculatus, 



175 Lithophagus plumula, 



176 Lithophagus aristatus, 



177 Lithophagus cinnamomeus, 



178 Leiosolenus spatiosus, 



179 Leiosolenus . 



FAMILY ARCADE. 



180 Area grandis, 



181 Area multicostata, 



182 Area ?labiata, 



183 Area bifrons, 



184 Area tuberc\ilosa, 



185 Area reversa, 



186 Area ?brevifrons, 



187 Area emarginata, 



188 Area — ; 



189 Byssoarca pacifica, 



190 Byssoarca mutabilis/ 



191 Byssoarca fusca, 



192 Byssoarca vespertilio, 



193 Byssoarca illota, 



194 Byssoarca gradata, 



195 Byssoarca solida ; 



196 Pectunculus inaequalis, 



197 Pectunculus ? multicostatus. 



FAMILY NUCULID^. 



198 Nucula ? exigua ; 



199 Leda ? elenensis. 



FAMILY AYICULID^. 



200 Pinna maura, 



201 Pinna lanceolata, 



202 Pinna ? rugosa ; 



203 Avicula sterna ; 



204 Margaritiphora fimbriata ; 



205 Isognomon chemnitzianum, 



206 Isognomon janus. 



FAMILY PECTINIDiE. 



207 Pecten circularis. 



FAMILY SPONDYLID^. 



208 Spondylus ealcifer, 



209 ? Spondylus ; 



210 Plicatula penicillata. 



FAMILY OSTREID^. 



211 Ostrea iridescens, 



212 Ostrea virginica, 



213 Ostrea columbiensis, 



214 Ostrea conchaphila, 



214J Ostrea ? conchaphila imr. 



[palmula, 



215 Ostrea . 



FAMILY ANOMIAD.E. 



216 Placunanomia pernoides, 



217 Placunanomia foliata, 



218 Placunanomia elaviculata ; 



219 Anomia lampe ; 



220 ? . 



